/**
 * #      1766
 * 名称   互质树
 * 链接   https://leetcode-cn.com/problems/tree-of-coprimes
 * 题解   [21](https://leetcode-cn.com/problems/tree-of-coprimes/solution)
 * 通过率 36.6%
 * 难道   困难
 */

